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Reddish brown gas is obtained when the following are treated with conc. H2SO4 : (A) Br^ – (B) NO3^– (C) SO3^2–

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Reddish brown gas is obtained when the following are treated with conc. H2SO4 : 

(A) Br – 

(B) NO3– 

(C) SO32– 

(D) I –

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(A) Br – 

(B) NO3– 

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